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-rw-r--r--include/uapi/asm-generic/msgbuf.h47
1 files changed, 47 insertions, 0 deletions
diff --git a/include/uapi/asm-generic/msgbuf.h b/include/uapi/asm-generic/msgbuf.h
new file mode 100644
index 00000000000..aec850d9159
--- /dev/null
+++ b/include/uapi/asm-generic/msgbuf.h
@@ -0,0 +1,47 @@
+#ifndef __ASM_GENERIC_MSGBUF_H
+#define __ASM_GENERIC_MSGBUF_H
+
+#include <asm/bitsperlong.h>
+/*
+ * generic msqid64_ds structure.
+ *
+ * Note extra padding because this structure is passed back and forth
+ * between kernel and user space.
+ *
+ * msqid64_ds was originally meant to be architecture specific, but
+ * everyone just ended up making identical copies without specific
+ * optimizations, so we may just as well all use the same one.
+ *
+ * 64 bit architectures typically define a 64 bit __kernel_time_t,
+ * so they do not need the first three padding words.
+ * On big-endian systems, the padding is in the wrong place.
+ *
+ * Pad space is left for:
+ * - 64-bit time_t to solve y2038 problem
+ * - 2 miscellaneous 32-bit values
+ */
+
+struct msqid64_ds {
+ struct ipc64_perm msg_perm;
+ __kernel_time_t msg_stime; /* last msgsnd time */
+#if __BITS_PER_LONG != 64
+ unsigned long __unused1;
+#endif
+ __kernel_time_t msg_rtime; /* last msgrcv time */
+#if __BITS_PER_LONG != 64
+ unsigned long __unused2;
+#endif
+ __kernel_time_t msg_ctime; /* last change time */
+#if __BITS_PER_LONG != 64
+ unsigned long __unused3;
+#endif
+ unsigned long msg_cbytes; /* current number of bytes on queue */
+ unsigned long msg_qnum; /* number of messages in queue */
+ unsigned long msg_qbytes; /* max number of bytes on queue */
+ __kernel_pid_t msg_lspid; /* pid of last msgsnd */
+ __kernel_pid_t msg_lrpid; /* last receive pid */
+ unsigned long __unused4;
+ unsigned long __unused5;
+};
+
+#endif /* __ASM_GENERIC_MSGBUF_H */